Geographical clock



De@ l0, 1935. c. a. SEGOVIA GEOGRAPHICAL CLOCK INVENTX ATTORN EYS Uris/UZ. B S

0 a wR A NKUERKY RNW PIB l T A N V ARI MHLNMm w00 ,mmwmw www EIR M B w in w M w o 4 M 4/ Kx! uw E lD 0D@ A E Dn GN M.nn WMA AAM AAWA oww PLM HH A5 c A OMG m GA MME Ja @AMW VM PAS VMS WITN ESSES #41E- mm.

e ova@ BY g u Mm Patented Dec. 10, 1935 UNITEDA STATES PATENT OFFICE Application April 16,

4 Claims.

This invention relates to geographical instruments and particularly to an improved clock for indicating the time of day at various points over the entire earth, the structure being such that not only the particular hour is indicated but also whether it is morning or evening, or day or night.

An object of the invention is to provide a clock which has the usual clock mechanism now well known and, in addition, means for indicating on a traveling tape the hour and also information as to whether it is day or night.

Another object of the invention is to provide a geographical clock presenting the names of different points or places and indicating the time of day at the respective places.

An additional and more specific object is to provide a geographical clock in which one or more traveling tapes may be used for indicating more or less the time of day at a large number of points on the earth.

In the accompanying drawings- Figure l is a front view of the complete clock is it appears when in use;

Fig. 2 is a vertical sectional View through the structure shown in Fig. 1, the section being taken on the line 2--2 of Fig. 3;

Fig. 3 is a sectional view through Fig. 2 approximately on the line 3 3;

Fig. 4 is a front view of a modified form of clock to that shown in Fig. 1 wherein only a single traveling tape is used;

Fig. 5 is a view similar to Fig. 2 but showing a single tape instead of a double tape.

Referring to the accompanying drawings by numerals, I indicates a casing which may be wood, metal, or other material, said casing having a brace 2 secured therein by any desired means, as, for instance, screws. This brace is near the edge of the casing, while the front 3 is provided with openings 4 and 5, each opening having a suitable glass or plate 6 arranged therein so as to close the casing and prevent dust from entering. As shown in Fig. 2, there are provided tapes 1 and 8. As these tapes are identical a description of one will apply to both.

As Fig. 3 is taken through Fig. 2 on the section line 3 3, the tape 'I will be readily seen back of the plate 6 in the opening 5. This tape and tape 8 are each provided with equally spaced numbers or legends 9 indicating hours and adjacent these numbers are suitable graduation marks I0. If desired, a number of graduation marks may be positioned between the numbers or legends 9. 'Ihe numbers 9 are spaced one hour apart and are arranged to indicate the hours of the day,

1935, Serial No. 16,700

there being a sufiicient number to indicate two days on each tape. In addition to the numbers 9 and graduations ID, there are provided two shaded areas I I for indicating night-time, namely, from six oclock in the evening to six oclock 5 the next morning, or a twelve-hour period. The tape 3 is positioned to move as indicated by the arrow I2 in Fig. 1, and when the tape is positioned as shown in Fig. 1, it indicates that the time is six thirty a. m. at London, Madrid and Paris. 10 The same arrangement is made in regard to the tape 'I which is seen through the opening 5. At the same time that it is six thirty a. m. in London, it is six thirty p. m. at Pago-Pago. It will be understood that the tapes I and 8 move si- 15 multaneously and in thel same direction, namely, as indicated by the arrows I2 and I3, a movement of the respective tapes causing actuations of certain mechanisms which will now be described.

As indicated in Fig. 3, the housing I4 indicates 20 a clock of any desired kind having the usual hourhand I5 (Fig. 1) and minute-hand I6. The minute-hand I6 is secured to a suitable minute shaft I'I, which makes one complete rotation in an hour. To the minute shaft II is connected a 25 driving shaft I8 which carries a gear I9 meshing with a gear 20. The gears I9 and 20 may be of any suitable kind, as, for instance, spiral gears, and their gear ratio is two to one as far as function is concerned, whereby one revolution of the 30 shaft I8 will produce one-half a revolution of the gear wheel 20. The gear wheel 20 has a driving shaft 2l rigidly secured thereto, said driving shaft being supported by suitable brackets 22 carried by the brace 2 and also by brackets 23 and 24 35 carried by the casing I. Sprocket wheels 25 and 26 are secured to the shaft 2 I and have their teeth continually meshing or fitting into the perforations in the respective tapes I and 8, whereby whenever shaft 2| is moved the tapes will also be moved. The parts are so proportioned that upon one-half a revolution of the gear wheel 20 the tapes will move forwardly a distance of one hour, which is the space between any two legends or numbers 9.

When the construction is used as shown in Figs. 1, 2 and 3, therewill be the usual clock face, as illustrated in Fig. 1, over which the usual hands I5 and I6 move as well as the usual second hand I6. In addition to this clock face the respective 50 tapes 1 and 8 will be so placed that a person at any of the places indicated on the clock may observe the time of day it is, and also the time of day at many other places. From Figure 1 it will be observed there is a column 21 contain- 66 Y the tape is moved downwardly,

ing names and also a column 28 containing names, and opposite each name or group of names there is a graduation mark, said graduation marks being spaced one hour apart to agree with the hour graduations on the tapes and 8. It will be understood that other names may be used in the columns 21 and 28 than those shown, these names being shown merely to illustrate the idea.

As the tapes 1 and 8 are both four times as long as the amount shown in Fig. 1, they are preferably supported as shown in Fig. 3, namely,

by the respective sprockets and idlers 29 and 30.

In addition, for each tape there is a tension roller 3| carried by a shaft 32, which, in turn, is supported by a swinging arm 33 pivotally mounted at 34 on the casing The roller 3| may produce the desired tension by gravity, but preferably it is made comparatively light and a retractile spring 35 is used to maintain the desired tension so that the parts will function accurately regardless of the position in which the clock may be placed. Y

Instead of' having two tapes in the particular `mechanism shown in Fig. 2, the invention contemplates the use of a single tape in combination with the same clockwork i4 as indicated in Fig. 3, which is preferably an ordinary standard clock. As shown in Figs. 4 and 5, there is a single tape 31 which is preferably of the same length as the tape 1 and provided with perforations so as to be driven by a sprocket wheel 38 in a similar manner to that in which the tape 1 is driven. The tape 31 is supported by the same kind of idlers, namely, 29 and 30, and also by the sprocket wheel 38 with the tension roller 3| being used in the same manner as shown in Fig. S. However, instead of having the driving shaft 2| and detail structure associated therewith, the sprocket wheel 38 is provided with a shaft 39 to which a gear whe-el 40 is secured, which gear wheel meshes with a pinion 4|. The pinion 4| is secured to the minute shaft of the clock in any desired manner so that the ratio between the pinion 4| and gear 40 is twoto one, whereby the sprocket wheel 38 will move the tape 31 a distance of one hour when pinion 4| rotates once. As shown in Fig. 4, there are columns 21 and 28 having the names of places or points on the earth with indicating marks arranged adjacent thereto and adjacent the opening 4 whereby the relative position of the tape 31 and the names of -the different points or cities may be readily seen, but in this form of the invention as indicated by the arrow 42, and the tape is provided with shaded portions 43 and 44 on opposite sides to indicate the night-time of the respective days provided on the tape. For instance, as shown in Fig. 4, it is six oclock, A. M. in Londonl and Parisand six oclock P. M. at Pago-Pago. As the tape is moving downwardly it indicates that the day is just starting in London and is just ending in Pago-Pago. Aside from the details just set forth the structurey shown in Figs. 4 and 5 is identical with that shown in Figs. 1 and 2.

I claim:

1. A geographical clock, including' a casing,

a standard clock mechanism having a minute shaft, a driving shaft connected with the minute shaft so as to rotate at the same speed as the minute shaft, a pair of tapes, each tape having graduations thereon indicating hours and shaded zones indicating night-time, said shaded Azones being spaced apart so that when'the tapes are moved past a given point the proper indication will be made as to the time of day at that given point and also whether it is day or night, said casing having an opening in the face thereof for each of said tapes, said openings being suf- 5 ciently long tol expose enough of each tape to present to view twelve hours. means for indicating names of places, on the earth, arranged alongside of each of said openings, the places indicated by the names adjacent one opening being located in one hemisphere and the places indicated by the names adjacent the other opening being located in the opposite hemisphere, means for supporting said tapes while permitting the same to move past said openings longitudinally thereof so that the gr-aduations thereon may be moved past said place-indicating means, said means including a sprocket wheel for each tape, a single shaft rigidly connected to both of said sprocket wheels, a gear wheel rigidly secured to said shaft, and a second gear Wheel rigidly secured to said driving shaft, said second-mentioned gear wheel meshing with the first-mentioned gear wheel, and said gear wheels being of a ratio of two to one so that the rotation of said driving shaft one revolution will move both of said tapes a distance equal to one hour.

2. A geographical clock, including a casing having a pair of parallel openings, tapes having graduations thereon indicating not less than forty-eight hours and shaded zones indicating twelve hours, said shaded Zones being spaced along the tapesat distances of twelve hours apart so that the shaded zones may indicate night and the unshaded zones day, a pair of supporting guide rollers for said tapes, a pair of driving sprocket wheels forsaid tapes, a standard clockwork connected to said sprocket wheels for rotating the same at a speed whereby said tapes will move past a given point at the rate of one graduation per hour, and means on the casing arranged alongside said tapes presentingV the names of specified points on the earth, the places indicated by the names adjacent one opening being located in one hemisphere and the places indicated by the names adjacent the other opening being located in the opposite hemisphere.

3. A geographical clock adapted to indicate the time of day at certain points over the entire surface of the earth, comprising a casing having a face, means on the face for indicating in two columns the names of places, one column indicating the names of places on one-half the earth and the other column indicating places on the other half of the earth, an opening in said casing opposite each row of names, a traveling tape for each opening, said tapes moving longitudinally of the openings, continually exposed graduations on the tapes indicating twelve hours, a Standard clock mechanism arranged in the casing, and means driven by said clock mechanism acting to move said tapes simultaneously at a rate whereby a given point on the respective tapes will move the full distance of the respective openings in twelve hours. 65

4. A geographicalclock having a casing with a Yfront face, said front face having a pair of parallel openings therein, a row of names on one side of each of said openings, the names adjacent one opening being located in one hemisphere and the names adjacent the other opening being located in the opposite hemisphere, an indicating line er:u tending from each of said names toy the opening, an endless tape foreach opening, a pair of rollers y for each tape arranged within the casing, said ranged in said casing, and means for connecting the clock mechanism to said driving structure for driving said driving structure and said tapes at a rate which will move said tapes so that any one of the graduations exposed will move from one 5 given point to another in one hour.

CRISPIN B. SEGOVIA. 

